HEIC is based on the HEIF/HEVC codec, and many browsers and OS environments still do not ship a native decoder.
That’s why libraries like FileReader, canvas, Pillow, or Sharp may fail to load HEIC images directly.
If you want to convert HEIC → PNG programmatically:
- Python: install pillow-heif and convert through Pillow
- Node.js: use Sharp with libvips HEIF support enabled
- iOS: use CGImageSource / CIImage to re-encode as PNG
- Android: HEIC decoding requires API 28+ or ImageDecoder
If you only need a quick conversion without installing libraries,
a browser-based tool works well:
(Conversion happens on the client side; no uploads required.)